CN113973808A - 一种改进的细胞冻存液配方 - Google Patents
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Abstract
本发明提供了一种改进的细胞冻存液配方,该配方是在传统的细胞冻存液由基础培养基:胎牛血清:DMSO=5:4:1组成中进行改进,在原冻存液中加入1.5%的2mM Se溶液和1.5%的20mM ATP溶液,加入之后,与细胞混匀,梯度降温冻存细胞。该配方可以显著地提高细胞存活率,以利于下一步涉及到细胞生物学实验的顺利开展。
Description
技术领域
本发明属于细胞生物学技术领域,特别是有关细胞冻存的技术领域。
背景技术
在细胞生物学研究的过程中,细胞培养是最基本的操作。随着生物学实验技术的发展,细胞体外培养技术被广泛应用于各个领域中。细胞培养的传代及日常维持过程中,在培养器具、培养液及各种准备工作方面都需大量的耗费,细胞一旦离开活体开始原代培养,它的各种生物特性都将逐渐发生变化,并随着传代次数的增加和体外环境条件的变化而不断有新的变化。因此及时进行细胞冻存十分必要。
利用冻存技术将细胞置于-196℃液氮中低温保存,可以使细胞暂时脱离生长状态,减少细胞代谢,将其细胞特性保存起来,也可防止因正在培养的细胞被污染或其他意外事件而使细胞丢种,起到细胞保种的作用。
传统冻存液由基础培养基:胎牛血清:DMSO=5:4:1组成。冻存时向培养基中加入保护剂二甲基亚砜(DMSO),因分子量小能够较快的渗入细胞中与水分子结合,降低细胞冰点和细胞内外的电解质浓度,在缓慢冻结条件下,改变细胞膜对水的通透性,细胞内水分透出,减少了冰晶形成,从而避免细胞损伤。但DMSO在常温下对细胞有一定的毒性,极性很强能够与细胞内的多种蛋白质结合,改变其空间结构,使多种酶失活。
胎牛血清中含有丰富的细胞生长所必需的营养物质,能够为细胞提供生长、分化、繁殖和黏附的生理环境,是细胞培养中最天然的培养基,中和DMSO 毒性,对细胞有保护作用。
体外培养细胞传统冻存液冻存复苏后的存活率不高,阻碍了其生物学方面的研究进展。因此,开发高效、经济、实用的冻存液,提高细胞存活率,是顺利进行后续各项生物学实验关键所在。
ATP(三磷酸腺苷),是生命活动能量的直接来源。水解产生ADP(二磷酸腺苷)和一个Pi(磷酸基团),同时释放能量,产生的能量供各种生化反应所用,改善新陈代谢。
Se硒,保护细胞膜和染色体,保护核糖核酸等大分子的结构及功能,能阻止过氧化物和自由基的形成。在改进配方中,于原冻存液中加入了ATP溶液和Se溶液,极大地提高了细胞的存活率。
发明内容
本发明提供了一种改进的细胞冻存液配方,可以有效解决上述问题。
本发明提供了一种改进的细胞冻存液配方,包括以下组分:
一种改进的细胞冻存液配方,原细胞冻存液中加入1.5%的2mM Se溶液,以用于冻存细胞。
一种改进的细胞冻存液配方,原细胞冻存液中加入1.5%的20mM ATP溶液,以用于冻存细胞。
具体实施方式
下面将对本发明的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动条件下所获得的所有其它实施例,都属于本发明保护的范围。以下为针对传统冻存液和冻存液的改进配方实例。
本发明采用的实验步骤如下:
(1)细胞培养、传代,显微镜下观察待细胞生长状态良好、铺满培养瓶瓶底80-90%,于生物安全柜内进行实验操作。用PBS清洗细胞2次,弃去洗液,加入适量胰酶消化细胞,于37℃5%CO2培养箱静置一段时间。
(2)取出培养瓶,于显微镜/肉眼观察细胞消化状态,补充等体积的含血清培养基,适当力度吹打混匀培养瓶四个角和中间,转移至15ml离心管,1000rpm离心3min。
(3)离心后,倒掉上清,加入适量培养基重悬,细胞计数。按细胞密度 5×106个/ml,比例基础培养基:胎牛血清:DMSO=5:4:1配冻存液,混匀。
(4)在冻存前,于原冻存液中分别加入1.5%的2mM Se溶液和1.5%的20mM ATP溶液。加入之后,再与细胞混匀,
(5)转入细胞冻存管内,一般容量为1ml/管。封口膜封口,管壁做好标记(细胞名称、培养基、代数、日期、操作人)后转入程序降温冻存盒,-80℃过夜,再转入液氮保存。
以293T cell的细胞存活率作为参照,对传统冻存液和改进冻存液进行比较。
对传统冻存液和改进冻存液的细胞毒性分别进行测定,通过酶标仪记录 OD=450nm值。
用传统冻存液和改进冻存液分别冻存细胞一段时间后,进行细胞复苏,以1:1的比例在细胞中加入0.08%台盼蓝,通过细胞计数仪计算细胞总数、活细胞数,确定细胞存活率。
使用改进的冻存液配方,确定可以极大的提高细胞的存活率,且毒性较小。
传统冻存液 | 改进冻存液 | |
OD值 | 1.6428 | 1.2527 |
细胞总数 | 4.78×10<sup>6</sup> | 4.47×10<sup>6</sup> |
活细胞数 | 1.15×10<sup>6</sup> | 1.67×10<sup>6</sup> |
存活率% | 24±3% | 38±4% |
传统冻存液和改进的冻存液配方的CCK8 OD值和细胞存活率值对比。
Claims (2)
1.一种改进的细胞冻存液配方,其特征在于:原细胞冻存液中加入1.5%的2mM Se溶液,以用于冻存细胞。
2.一种改进的细胞冻存液配方,其特征在于:原细胞冻存液中加入1.5%的20mM ATP溶液,以用于冻存细胞。
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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CN1784142A (zh) * | 2003-05-09 | 2006-06-07 | 生命血液医学公司 | 用于维持器官和细胞生存能力的组合物 |
CN102511471A (zh) * | 2011-12-15 | 2012-06-27 | 成都清科生物科技有限公司 | 一种间充质干细胞冻存液及其制备方法 |
CN109042625A (zh) * | 2018-08-01 | 2018-12-21 | 广州润虹医药科技股份有限公司 | 一种冻存液及其在脐带间充质干细胞冻存中的应用 |
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Publication number | Priority date | Publication date | Assignee | Title |
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CN1784142A (zh) * | 2003-05-09 | 2006-06-07 | 生命血液医学公司 | 用于维持器官和细胞生存能力的组合物 |
CN102511471A (zh) * | 2011-12-15 | 2012-06-27 | 成都清科生物科技有限公司 | 一种间充质干细胞冻存液及其制备方法 |
CN109042625A (zh) * | 2018-08-01 | 2018-12-21 | 广州润虹医药科技股份有限公司 | 一种冻存液及其在脐带间充质干细胞冻存中的应用 |
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